THE HEART
Our heart is a special muscle in our body called myogenic muscular organ, without it we wouldn’t be able to live. Hearts are found all in animals with a circulatory system, the main job of this muscle organ is to send blood to the organs around our body, supplying them with oxygen and nutrients they need via the blood and also to clean the blood from CO2. The heart is approximately the size of a fist and weighs about 10.5 ounces. The heart is just like a pump, each time your heart beats the muscle contracts and squirts the blood into the vessels.
This is a diagram of the heart
Our heart is located in the middle (a bit more to the left) of our chest. To be more specific, the heart is located in the chest cavity which is next to the breastbone and is between the lungs and above the diaphragm. The heart weighs about 10.5 ounces and it is shaped like a cone with nearly the same size as our fist . The arrows indicate the blood flow
The heart is split into 2 parts
Left side
Blood comes from the lungs (got cleaned)
Blood goes to the body
Right side
Blood comes from the body
Blood goes to lungs (to get cleaned)
To be more specific, heart has 4 chambers and those 4 chambers are: left atrium, right atrium, left ventricle, right ventricle
name of chamber
their job
Left atrium
To rise the amount of blood that goes into the left ventricle for supply to the systemic circuit
Right atrium
Receive deoxygenated blood (used by body parts) through vena cava, then send deoxygenated blood to lungs to make it oxygenated
Left ventricle
Send blood out of the heart
Right ventricle
Recieve blood from the right atrium and send it to main pulmonary artery
The right side is the blue colored parts of the heart as the blood has been used and has CO2. The red part is the left side and it is the blood that just came out of lungs which now has oxygen and nutrients. As you can see that the left side is much bigger this is because it needs more muscle because it needs to squirts the blood to the brain and to the toes therefore it needs to be very strong.
The animation below shows clearly the direction of which kind of blood, whether it containes oxygen or not, starts from where and explain the heart is divided (see table under).
These are the three main parts of the heart
These three parts are the most important parts of the body
These are the steps of the blood flow (heart):First the blood either comes from the lung or from the body. The atrium stores this blood waiting for the heart to expand so that the valves will open and let the blood into the ventricle. Then when the heart contracts the valve opens and the blood in the ventricle pumps the blood into the body or the lung. The heart always beats coordinated so that it is more efficient. There are little cells in the heart that create electronic pulses which coordinates the conractions of the atrium and ventricles. This can be measured in a hospital using a ECG. http://www.health.com/health/library/mdp/0,,aa54865,00.html
Coronary Heart Disease
Outside of the heart, branching off from the aorta, are arteries called the coronary arteries. It is through these arteries that the heart muscle’s blood supply is delivered. The coronary arteries play a significant role in providing the heart with necessary blood full of oxygen and nutrients such as glucose. Therefore, dysfunction in the coronary arteries would have a very negative impact on the heart and the entire human body.
The coronary heart disease is the result of such. When there is build-up of plaque (which is made up of cholesterol and other cells) in the inner walls of the artery, the coronary arteries become narrowed or blocked. This is very fatal, as the supply of blood possible of being delivered to the heart muscle is lessened or cut-off altogether. If the arteries are narrowed, then there are no symptoms during rest. However, when the body is performing some action such as running, the heart muscle needs the supply of oxygen that the narrow arteries are incapable of supporting, resulting in pain for the person.
Worse, though, is if the coronary arteries are fully clogged. The heart muscle would be deprived of necessary oxygen and glucose. A heart attack would result when part of the heart muscle stops contracting. Other parts of the body would be negatively affected too, as these tissues would not be receiving the oxygen and nutrients that the heart pumps around. The results of these arteries becoming completely blocked also includes electrical pulses that lead to ventricular fibrillation. This is when the rhythm of the heart is severely irregular and, if not dealt with accordingly, can result in death.
Self Drawn image of the heart
Work Cited:
"Normal Heart." Health. N.p., n.d. Web. 31 May 2011. <http://www.health.com/ health/library/mdp/0,,aa54865,00.html>. Pickering, W R. Complete Biology. New York: Oxford University Press, 2000. Print.
Our heart is a special muscle in our body called myogenic muscular organ, without it we wouldn’t be able to live. Hearts are found all in animals with a circulatory system, the main job of this muscle organ is to send blood to the organs around our body, supplying them with oxygen and nutrients they need via the blood and also to clean the blood from CO2. The heart is approximately the size of a fist and weighs about 10.5 ounces. The heart is just like a pump, each time your heart beats the muscle contracts and squirts the blood into the vessels.
This is a diagram of the heart
Our heart is located in the middle (a bit more to the left) of our chest. To be more specific, the heart is located in the chest cavity which is next to the breastbone and is between the lungs and above the diaphragm. The heart weighs about 10.5 ounces and it is shaped like a cone with nearly the same size as our fist . The arrows indicate the blood flow
The heart is split into 2 parts
To be more specific, heart has 4 chambers and those 4 chambers are: left atrium, right atrium, left ventricle, right ventricle
"Answers.com - What Is the Job of Your Heart's Left Atrium."WikiAnswers - The Q&A Wiki. Web. 31 May 2011. http://wiki.answers.com/Q/What_is_the_job_of_your_heart's_left_atrium
"What Are the Jobs of the Right Atrium, The Right Ventricle, The Left Atrium and the Left Ventricle? l ChaCha Answers." Questions & Answers / Cha Cha. Web. 31 May 2011. http://www.chacha.com/question/what-are-the-jobs-of-the-right-atrium,-the-right-ventricle,the-left-atrium-and-the-left-ventricle.
"Ventricles of the Heart, " Biology. Web. 31 May 2011. http://biology.about.com/od/anatomy/ss/ventricles.htm.)
The right side is the blue colored parts of the heart as the blood has been used and has CO2. The red part is the left side and it is the blood that just came out of lungs which now has oxygen and nutrients. As you can see that the left side is much bigger this is because it needs more muscle because it needs to squirts the blood to the brain and to the toes therefore it needs to be very strong.
The animation below shows clearly the direction of which kind of blood, whether it containes oxygen or not, starts from where and explain the heart is divided (see table under).
These are the three main parts of the heart
These three parts are the most important parts of the body
These are the steps of the blood flow (heart):First the blood either comes from the lung or from the body. The atrium stores this blood waiting for the heart to expand so that the valves will open and let the blood into the ventricle. Then when the heart contracts the valve opens and the blood in the ventricle pumps the blood into the body or the lung. The heart always beats coordinated so that it is more efficient. There are little cells in the heart that create electronic pulses which coordinates the conractions of the atrium and ventricles. This can be measured in a hospital using a ECG.
http://www.health.com/health/library/mdp/0,,aa54865,00.html
Coronary Heart Disease
Outside of the heart, branching off from the aorta, are arteries called the coronary arteries. It is through these arteries that the heart muscle’s blood supply is delivered. The coronary arteries play a significant role in providing the heart with necessary blood full of oxygen and nutrients such as glucose. Therefore, dysfunction in the coronary arteries would have a very negative impact on the heart and the entire human body.
The coronary heart disease is the result of such. When there is build-up of plaque (which is made up of cholesterol and other cells) in the inner walls of the artery, the coronary arteries become narrowed or blocked. This is very fatal, as the supply of blood possible of being delivered to the heart muscle is lessened or cut-off altogether. If the arteries are narrowed, then there are no symptoms during rest. However, when the body is performing some action such as running, the heart muscle needs the supply of oxygen that the narrow arteries are incapable of supporting, resulting in pain for the person.
Worse, though, is if the coronary arteries are fully clogged. The heart muscle would be deprived of necessary oxygen and glucose. A heart attack would result when part of the heart muscle stops contracting. Other parts of the body would be negatively affected too, as these tissues would not be receiving the oxygen and nutrients that the heart pumps around. The results of these arteries becoming completely blocked also includes electrical pulses that lead to ventricular fibrillation. This is when the rhythm of the heart is severely irregular and, if not dealt with accordingly, can result in death.
Self Drawn image of the heart
Work Cited:
"Normal Heart." Health. N.p., n.d. Web. 31 May 2011. <http://www.health.com/ health/library/mdp/0,,aa54865,00.html>.
Pickering, W R. Complete Biology. New York: Oxford University Press, 2000. Print.